PADI Open Water Exam Study Guide with Complete Solutions 2023/2024 When is an object positively buoyant? - Correct Answer When it displaces a volume of water weighing more than its own weight.When is an object negatively buoyant? - Correct Answer When it displaces a volume of water weighing less than its own weight.When is an object neutrally buoyant? - Correct Answer When it displaces a volume of water weighing the same as its own weight.Why two pieces of equipment do you use to control your buoyancy? - Correct Answer BCD, Lead weight What does buoyancy help with when you are underwater? - Correct Answer Controlling where you are What does buoyancy help with when you are at the surface? - Correct Answer Floatation, conserving energy How does the buoyancy of an object differ in fresh/salt water? - Correct Answer More buoyant in salt than fresh When you exhale what happens? - Correct Answer Lung volume decreases so you have less buoyancy.When you inhale what happens? - Correct Answer Lung volume increases so you have more buoyancy.Why don't you feel air pressure? - Correct Answer Your body is primarily liquid, which is incompressible and distribute pressure equally throughout your whole body.Where are some air spaces located in the body? - Correct Answer Ears, sinuses, lungs 1 / 2
Do you always feel the pressure in body air spaces? - Correct Answer Only if the pressure is different inside and outside the air spaces.
- bar is what depth? - Correct Answer 0m/0ft
- bar is what depth? - Correct Answer 33ft/10m
- bar is what depth? - Correct Answer 66ft/20m
- bar is what depth? - Correct Answer 99ft/30m
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How is air volume affected when depth is increased? - Correct Answer It decreases How is air density affected when depth is increased? - Correct Answer It increases What happens if you take an air volume underwater with you in a flexible container or inverted jar? - Correct Answer As pressure increases the volume decreases, same air but smaller space.How do you maintain air volume as you descend? - Correct Answer Equalize What is a "squeeze"? - Correct Answer As volume decreases, pressure pushes body tissues inwards toward air space, causing discomfort. Pressure outside air space is more than pressure inside air space.Where can you get a squeeze? - Correct Answer Ears, sinuses, mask, lungs, teeth How do you equalise air spaces in ears? - Correct Answer Blow and squeeze nose, wiggle jaw, swallowing How often should you equalise? - Correct Answer Every metre before discomfort